Operation Check

HINT:

• If a sensor has an open circuit or a sensor's detection operation malfunctions because it is wet or frozen, a malfunction display is shown in the multi-information display and multi-display, and the buzzer sounds.
• When the sensor condition returns to normal, the system ends normal clearance sonar mode and returns to steering sensing mode.
• If the clearance sonar main switch is ON and the engine switch is turned on (IG), the buzzer does not sound.

1. If there is an open circuit between the ultrasonic sensor and the clearance warning ECU or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.
   Fig 1: Buzzer Sound Timing Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 2: Identifying Ultrasonic Sensor Open Circuit Display

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   • The example shows an open circuit in the No. 3 ultrasonic sensor (front left sensor).
   • If a sensor has an open circuit, refer to "open circuit is displayed during self-check function" on the Problem Symptoms Table to inspect it.

1. If a sensor is covered with foreign matter, such as mud or snow, the affected sensor is displayed as shown in the illustration.
   Fig 3: Identifying Ultrasonic Sensor Frozen Display

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   • The example shows that the No. 3 ultrasonic sensor (front left sensor) is covered with foreign matter.
   • If "CLEAN SONAR" is displayed, cleaning the foreign matter from the sensor will return the sensor to normal.

1. A malfunction condition is displayed as shown in the illustration if one of the following occurs: 1) the steering angle sensor is determined to be malfunctioning; 2) the VGRS system*1 is malfunctioning; 3) there is an open circuit between the steering angle sensor and clearance warning ECU; or 4) as a result of low battery voltage, CAN communication information is blocked.
   Fig 4: Identifying Steering Angle Information Failure Display

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   • *1: Variable gear ratio steering system (3UZ-FE only)
   • The steering angle sensor and VGRS system communicate with the clearance warning ECU via the CAN.
   • When a steering angle information failure occurs, the system enters normal clearance sonar mode.

1. If the malfunction can be repaired by disconnecting and reconnecting the cable from the negative (-) battery terminal, or performing the steering angle mid-point learning operation again, it is displayed as shown in the illustration.
   Fig 5: Identifying Steering Angle Mid-Point Learning Operation Display

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   • When the steering angle mid-point learning operation is complete, the steering sensing function returns to normal.
   • During the steering angle mid-point learning operation, the system enters normal clearance sonar mode.

1. If there is an open circuit between the ultrasonic sensor and the clearance warning ECU or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration.

   HINT:

   • This example shows an open circuit in the No. 1 ultrasonic sensor (rear right sensor).
   • If a sensor has an open circuit, refer to "open circuit is displayed during self-check function" on the Problem Symptoms Table to inspect it.

Fig 6: Identifying Ultrasonic Sensor Open Circuit Display

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. If a sensor is covered with foreign matter, such as mud or snow, the affected sensor is displayed as shown in the illustration.

   HINT:

   • The example shows that the No. 3 ultrasonic sensor (front left sensor) is covered with foreign matter.
   • If "CLEAN SONAR" is displayed, cleaning the foreign matter from the sensor will return the sensor to normal.

Fig 7: Identifying Ultrasonic Sensor Frozen Display

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. A malfunction condition is displayed as shown in the illustration if one of the following occurs: 1) the steering angle sensor is determined to be malfunctioning; 2) the VGRS system *1 is malfunctioning; 3) there is an open circuit between the steering angle sensor and clearance warning ECU; or 4) as a result of low battery voltage, CAN communication information is blocked.

   HINT:

   • *1: Variable gear ratio steering system (3UZ-FE only)
   • The steering angle sensor and VGRS system communicate with the clearance warning ECU via the CAN.
   • When a steering angle information failure occurs, the system enters normal clearance sonar mode.
   • The detection range display labeled *2 appears in normal clearance sonar mode.

Fig 8: Malfunction Display - Steering Angle Information Failure

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. If the malfunction can be repaired by disconnecting and reconnecting the cable from the negative (-) battery terminal, or performing the steering angle mid-point learning operation again, it is displayed as shown in the illustration.

   HINT:

   • When the steering angle mid-point learning operation is complete, the steering sensing function returns to normal.
   • During the steering angle mid-point learning operation, the system enters normal clearance sonar mode.
   • The detection range display labeled *1 appears in normal clearance sonar mode.

1. Turn the engine switch on (IG).
2. Move the shift lever to any position except P or R to check the No. 3 ultrasonic sensors.

   HINT:

   The front right center and front left center sensors (No. 3 ultrasonic sensors) do not operate when the shift lever is on R.

   Fig 9: Identifying Steering Angle Mid-Point Learning Operation Display

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Move the shift lever to any position except R to check the No. 1 and No. 2 ultrasonic sensors.

   HINT:

   • The No. 1 and No. 2 ultrasonic sensors do not operate when the shift lever is in a position other than R.
   • The front right center and front left center sensors (No. 3 ultrasonic sensors) do not operate when the shift lever is on R.

• No. 3 Ultrasonic Sensor Detection Range:
  Fig 10: Aiming Adjustment Chart - No. 3 Ultrasonic Sensor Detection Range

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
• No. 1 Ultrasonic Sensor Detection Range:
  Fig 11: Aiming Adjustment Chart - No. 1 Ultrasonic Sensor Detection Range

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
• No. 2 Ultrasonic Sensor Detection Range:

Fig 12: Aiming Adjustment Chart - No. 2 Ultrasonic Sensor Detection Range

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Operation condition: 

1. Multi-information Display and Multi-display
   Fig 13: Identifying Multi-Information Display And Multi-Display

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Buzzer Sound

Fig 14: Buzzer Sound Timing Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard 

Multi-information display (shift lever position not on P) 

Multi-display (shift lever position not on P) 

w/ Rear view monitor (shift lever position R) 

HINT:

• Ultrasonic waves are used to measure the detection range. However, the detection range may vary depending on the ambient temperature.
• "During collision judgment" refers to situations where the obstacle cannot be avoided using the steering wheel.
• "During avoidance judgment" refers to situations where the obstacle can be avoided using the steering wheel.
• "During low priority avoidance judgment" refers to situations where, with the current steering wheel position, the vehicle will not come within 250 mm (9.84 in.) of the obstacle.
• *5 in the illustration refers to the color and status of the steering guide mark on the displays.
• When the shift lever is on R, the front left center and front right center sensors do not operate.

Operation condition: 

1. Multi-information Display and Multi-display
   Fig 15: Multi-Information Display And Multi-Display

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Buzzer Sound

Fig 16: Buzzer Sound Timing Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard 

Multi-information display (shift lever position R) 

Multi-display (shift lever position not on P) 

w/ Rear view monitor (shift lever position R) 

HINT:

Ultrasonic waves are used to measure the detection range. However, the detection range may vary depending on the ambient temperature.

Operation condition: 

1. Multi-information Display and Multi-display
   Fig 17: Multi-Information Display And Multi-Display

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Buzzer Sound

Fig 18: Buzzer Sound Timing Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard 

Multi-information display (shift lever position R) 

Multi-display (shift lever position not on P) 

w/ Rear view monitor (shift lever position R) 

HINT:

Ultrasonic waves are used to measure the detection range. However, the detection range may vary depending on the ambient temperature.

Standard: 

Result is as shown in the illustration.